Perovskite nanostructures assembled in molten salt based on halogen anions KX (X = F, Cl and Br): Regulated morphology and defect-mediated photocatalytic activity
Hailili, R (Hailili, Reshalaiti); Wang, CY (Wang, Chuanyi); Lichtfouse, E (Lichtfouse, Eric)
2018
Source PublicationAPPLIED CATALYSIS B-ENVIRONMENTAL
ISSN0926-3373
Volume232Issue:9Pages:531-543
Abstract

Defect engineering of semiconductors provides an effective strategy for improving photocatalytic performance without doping alien elements. Understanding the defect and defect-related photocatalytic activity of semiconductors could lead to new horizon in the rational design of photocatalysts for practical applications. Herein, novel oxygen-deficiency contained perovskite CaCu3Ti4O12 with tunable structures of cube, nanoparticle and octahedron were for the first time synthesized via a feasible molten salt reaction approach depending on halogen anions of employed salts la (X = F, Cl and Br). Formation mechanisms of the different structures were revealed on the basis of innate characters of the selected halide anions. Assorted shapes display strong visible light absorption, which is interconnected with Ti displacement and oxygen deficiency. The photocatalytic performances of those three homologues were evaluated by an antibiotic degradation under visible light illumination. A superior photoefficiency is achieved for octahedron shaped crystal, which reduces 95.86% total organic carbon within 60 min and exhibits the reaction rate normalized to surface area of 1.261 x 10(-2) g min(-1) m(-2), approximately 3.687 and 3474 times larger than its counterparts. The outstanding degradation efficiency is ascribed to the synergetic roles of effective charge transfer, oxygen deficiencies and critical roles of active radicals resulting in carrier separation and efficiency enhancement. This work provides fundamental understanding of the morphology tailoring and defect controlling towards exploring new generation of visible light photocatalysts for environment and energy applications.

KeywordVisible Light Active Perovskite Oxygen Vacancy Molten Salt Synthesis Halogen Anions Tetracycline Degradation
DOI10.1016/j.apcatb.2018.03.075
Indexed BySCI
WOS IDWOS:000434004300058
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/5404
Collection中国科学院特殊环境功能材料与器件重点试验室
Affiliation1.Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Lab Environm Sci & Technol, Key Lab Funct Mat & Devices Special Environm, Urumqi 830011, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
3.Shaanxi Univ Sci & Technol, Sch Environm Sci & Engn, Xian 710021, Shaanxi, Peoples R China
4.Univ Aix Marseille, CEREGE, F-13100 Aix En Provence, France
Recommended Citation
GB/T 7714
Hailili, R ,Wang, CY ,Lichtfouse, E . Perovskite nanostructures assembled in molten salt based on halogen anions KX (X = F, Cl and Br): Regulated morphology and defect-mediated photocatalytic activity[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2018,232(9):531-543.
APA Hailili, R ,Wang, CY ,&Lichtfouse, E .(2018).Perovskite nanostructures assembled in molten salt based on halogen anions KX (X = F, Cl and Br): Regulated morphology and defect-mediated photocatalytic activity.APPLIED CATALYSIS B-ENVIRONMENTAL,232(9),531-543.
MLA Hailili, R ,et al."Perovskite nanostructures assembled in molten salt based on halogen anions KX (X = F, Cl and Br): Regulated morphology and defect-mediated photocatalytic activity".APPLIED CATALYSIS B-ENVIRONMENTAL 232.9(2018):531-543.
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